From c8cc52a72eded562905f2a1df47ce7f517dd0f53 Mon Sep 17 00:00:00 2001 From: avg Date: Tue, 7 Mar 2017 15:27:40 +0000 Subject: MFC r314058: zfs: lower priority of zio_write_issue threads by four Obtained from: Panzura Sponsored by: Panzura --- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) (limited to 'sys/cddl') diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c index 5aa0718..2f8b7d6 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/spa.c @@ -923,9 +923,17 @@ spa_taskqs_init(spa_t *spa, zio_type_t t, zio_taskq_type_t q) * The write issue taskq can be extremely CPU * intensive. Run it at slightly lower priority * than the other taskqs. + * FreeBSD notes: + * - numerically higher priorities are lower priorities; + * - if priorities divided by four (RQ_PPQ) are equal + * then a difference between them is insignificant. */ if (t == ZIO_TYPE_WRITE && q == ZIO_TASKQ_ISSUE) - pri++; +#ifdef illumos + pri--; +#else + pri += 4; +#endif tq = taskq_create_proc(name, value, pri, 50, INT_MAX, spa->spa_proc, flags); -- cgit v1.1